html, body {
    padding: 0px;
    margin: 0px;
}

body {
    background-color: black;
    color: white;
    text-align: center;

}

header {
    margin-bottom: 50px;
    margin-top: 200px;
    text-align: center;
}



#lien {
    width: 400px;
    padding: 10px;
background-color: yellow;
text-align:center;
text-decoration: none;
border: 2px solid rgb(120, 119, 119);
border-radius: 10px;

}

section {
    margin-top: 200px;
}
section ul {
    
    list-style: none;
}
section a {
    color: yellow!important;
    text-align: center;
}